CAPTRON controller, German CAPTRON model, CAPTRON price

CAPTRON controller is an electronic system for digital arithmetic operations, specifically designed for industrial environments. It uses a programmable memory to execute instructions for stored logic operations, sequential control, timing, counting, and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input (I) and output (O) interfaces. The programmable controller was developed on the basis of electrical control technology and computer technology, and has gradually evolved into a new type of industrial control device with a microprocessor at its core, integrating automation technology, computer technology, and communication technology. PLC has been widely used in the automatic control of various production machinery and processes, becoming one of the most important, widespread, and frequently applied industrial control devices, recognized as one of the three pillars of modern industrial automation (PLC, robotics, CAD/CAM).

CAPTRON Controller Classification

1) Non-networked door controller: a single unit manages one door; it cannot be controlled via PC software, nor can records be viewed; control is performed directly through the controller. Features include low price and simple installation and maintenance; however, records cannot be viewed. It is unsuitable for locations with more than 50 people or frequent personnel turnover (referring to frequent hiring and resignations), and also unsuitable for projects with more than 5 doors. 2) Networked door controller: an access control type that can communicate with a computer, managed directly using software, including card and event control. Benefits include convenient management, centralized control, record viewing, and analysis of records for other purposes. Features include higher price and increased difficulty in installation and maintenance, but simple training and value-added services such as attendance tracking. Suitable for projects with many people, high mobility, and many doors. 3) TCP/IP network door controller, also known as Ethernet networked access control, is a networkable access control system that connects the computer and controller via network cables. In addition to all the advantages of networked access control, it offers faster speed, simpler installation, greater networking capacity, and the ability to network across regions or cities. However, equipment costs are high, and computer networking knowledge is required. Suitable for large projects, locations with many people, speed-sensitive requirements, and cross-regional installations.

CAPTRON Controller Structure

1) Central Processing Unit (CPU): The Central Processing Unit (CPU) is the control hub of the PLC, serving as the neural center of the PLC. Each PLC system has at least one CPU. It receives and stores user programs and data entered from the programmer according to the functions assigned by the PLC system program; checks the status of the power supply, memory, I/O, and watchdog timer, and can diagnose syntax errors in the user program. When the PLC is running, it first receives the status and data from field input devices via scanning and stores them in the I/O image area, then reads the user program line by line from the user program memory, executes logical or arithmetic operations according to the instructions after command interpretation, and sends the results to the I/O image area or data registers. After all user programs are executed, the output states in the I/O image area or data in the output registers are transmitted to the corresponding output devices, cycling in this manner until operation stops. To further improve the reliability of the PLC, large-scale PLC systems also adopt dual CPU redundant systems or triple CPU voting systems. Thus, even if one CPU fails, the entire system can continue to operate normally. CPU speed and memory capacity are important parameters of the PLC, determining the operating speed of the PLC, the number of I/O, and software capacity, thereby limiting the control scale. 2) Memory: System program memory stores system software; user program memory stores PLC user program applications; data memory stores intermediate states and information during PLC program execution, equivalent to the RAM of a PC. 3) Input/Output Interface (I/O module): The interface between the PLC and electrical circuits is completed through the input/output section (I/O). The I/O module integrates the PLC's I/O circuitry; its input latch reflects input signal status, and output points reflect output latch status. Input modules convert electrical signals into digital signals for entry into the PLC system, while output modules do the opposite. I/O is divided into modules such as discrete input (DI), discrete output (DO), analog input (AI), and analog output (AO). 4) Communication Interface: The main function of the communication interface is to enable data exchange (communication) between the PLC and external devices. Communication interfaces come in various forms, with the most basic being standard serial interfaces such as UBS, RS-232, and RS-422/RS-485. Connections can be made using multi-core cables, twisted pair, coaxial cable, optical fiber, etc. 5) Power Supply: The PLC power supply provides operating power for the PLC circuitry and plays a crucial role in the entire system. A good, reliable power supply system is the most basic guarantee for the PLC. Generally, if AC voltage fluctuation is within +10% (+15%), the PLC can be connected directly to the AC mains without additional measures. Power input types include: AC power (220VAC or 110VAC), and DC power (commonly 24VDC).

CAPTRON Controller Features

1) High reliability and strong anti-interference capability: PLC uses software to replace a large number of intermediate relays and time relays, leaving only a small amount of hardware related to inputs and outputs, reducing wiring to 1/10~1/100 of that in relay control systems, significantly reducing failures caused by poor contact. High reliability is a key performance metric for electrical control equipment. PLC utilizes modern large-scale integrated circuit technology, strict manufacturing processes, and advanced internal anti-interference techniques, resulting in high reliability. For example, the mean time between failures for Mitsubishi's F series PLC is as high as 30 hours. Some PLC systems using redundant CPU have even longer mean times between failures. Regarding the external circuitry of PLC, compared to relay contactor systems of similar scale, electrical wiring and switch contacts are reduced to hundreds or even thousands of times less, greatly lowering failure rates. Additionally, PLC features hardware fault self-diagnosis, issuing alarm information promptly when faults occur. In application software, users can also incorporate peripheral device fault self-diagnosis routines, providing fault self-diagnosis protection for circuits and equipment other than the PLC. Thus, it is no surprise that the entire system exhibits extremely high reliability. 2) Complete hardware suite, comprehensive functionality, and strong applicability: PLC has developed into serialized products of various sizes (large, medium, and small), and has become standardized, serialized, and modularized, equipped with a wide variety of hardware devices for user selection. Users can flexibly and conveniently configure systems to compose systems of different functions and scales. Installation and wiring of PLC are also convenient, typically using terminal blocks for external connections [3]. PLC has strong load-driving capability, capable of directly driving general solenoid valves and AC contactors, suitable for industrial control applications of various scales. In addition to logic processing, modern PLC mostly possess comprehensive data arithmetic capabilities, usable in various digital control fields. A large number of PLC function units have emerged, allowing PLC to penetrate various industrial controls such as position control, temperature control, and CNC. Coupled with enhanced PLC communication capabilities and developments in human-machine interface technology, composing various control systems using PLC has become very easy. 3) Easy to learn and use, popular among engineering technicians: As a general-purpose industrial control computer, PLC is industrial control equipment oriented toward industrial and mining enterprises. Its interfaces are easy to use, and programming languages are readily accepted by engineering technicians. The graphical symbols and expression methods of ladder diagram language are quite close to relay circuit diagrams; only a few discrete logic control instructions of PLC are needed to conveniently implement relay circuit functions. This opens a convenient door for those unfamiliar with electronic circuits, computer principles, and assembly language to use computers for industrial control. 4) Easy to modify: System design, installation, and commissioning workloads are small, maintenance is convenient, and modifications are easy. PLC ladder programs generally adopt sequential control design methods. This programming method is regular and easy to master. For complex control systems, the design time for ladder diagrams is much less than that for designing relay system circuit diagrams. PLC replaces wiring logic with stored logic, greatly reducing external wiring of control equipment, significantly shortening the design and construction cycle of control systems, and making maintenance easier. More importantly, it makes it possible to change production processes for the same equipment by changing the program. This is very suitable for multi-variety, small-batch production scenarios. 5) Small size, light weight, and low energy consumption: Taking ultra-small PLC as an example, recently produced models have base dimensions smaller than 100mm, equivalent to only a few relays in size, thus reducing cabinet volume to 1/2~1/10 of the original. Its weight is less than 150g, and power consumption is only a few watts. Due to its small size, it is easily installed inside machinery, making it an ideal controller for mechatronics integration.

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